Antenna connector and electronic apparatus

1. An antenna connector comprising: a case having a tubular shape and formed with a connector base on one end side in an axial direction, and formed with an external contact part having a cylindrical shape on another end side in the axial direction; a center contact part having a shaft shape and disposed on a center axis of the external contact part; and an insulator having a tubular shape and disposed between the external contact part and the center contact part, wherein a space is formed between the external contact part and the insulator, and the external contact part is formed with at least one through-hole for draining water that establishes communication between the space and outside of the external contact part.

2. The antenna connector according to claim 1 , wherein the at least one through-hole comprises a plurality of the through-holes, and the external contact part is formed with the plurality of the through-holes spaced apart from each another in a circumferential direction.

3. The antenna connector according to claim 1 , wherein the at least one through-hole is formed at the external contact part near the connector base.

4. An electronic device comprising: a first unit having a display; and a second unit having an input part, the electronic device being constructed such that the first unit and the second unit are detachable, wherein the second unit includes a socket capable of housing a predetermined side of the first unit, and the socket includes the antenna connector according to claim 1 on a surface of a portion in which the first unit is housed.

5. The electronic device according to claim 4 , wherein in a usage state where the surface of the portion, in which the first unit is housed, of the socket is directed upward, the antenna connector is in a state where the external contact part is located above the connector base.